These companies could get a lift from Trump's inward-looking policies if he and the Republican-led Congress boost funding for infrastructure projects and cut taxes as much as they are proposing.

This stimulus could lead to higher levels of consumer and big business spending.

That could also help Ford(F) and GM(GM) somewhat. Those companies, who have also been targets of Trump for operations they have in Mexico, each get a little more than 60% of their revenue from the U.S.

Of course, there is no guarantee that Trump is going to get everything he wants from Congress. There's also the possibility that economic isolationism backfires and winds up hurting economic growth and U.S. consumers.

Potential Losers

Many big U.S. companies that rely heavily on foreign sales stand to lose if Trump's tough talk on tariffs winds up igniting a trade war.

GE(GE), Coke(KO), McDonald's(MCD), Procter & Gamble(PG) and Nike(NKE) sell more of their products abroad than in the U.S. So it's possible that those stocks could lag versus those with more of a U.S. presence -- especially if the dollar picks up more steam.

Although the dollar has started to weaken lately as Trump tries to talk it down, the greenback is still up significantly against other currencies since his election.

Investors think Trump's domestic focus should boost the dollar, which is bad for companies that sell more of their goods and services abroad -- and good for those which import less and focus on the U.S.

That could hurt big tech firms Apple(AAPL), Microsoft(MSFT), Facebook(FB) and Google-owner Alphabet(GOOGL), which also get more than half their revenue from international markets. So do Intel(INTC), Oracle(ORCL) and IBM(IBM).

But these and other tech stocks have actually led the market lately due to hopes that Trump's proposed corporate tax changes will lead them to bring more cash that they have sitting overseas back to the U.S.

The bet is that Apple and other giant tech firms may use that cash to hire more workers in the U.S., increase their dividends and buy back stock.

That may be true, but these tech companies may also find it tougher to do business internationally if foreign governments retaliate against Trump with their own tariffs on U.S exports.